Swing 实现的Gui链表

https://gitee.com/dgwcode/MyJavaCode

-Freight类可以实现的功能
·构造方法：初始空车厢有5个
·装货：当运往某地点的货物大于等于4个的时候，如果有空车箱，则先占用整个空车厢，如果没有空车厢，则在尾部新增一个车厢节点，存放货物（假设不存在超过7个的情况），并且从链表头部依次搜索是否有车厢还有空位，如果有，将多出来的零散货物分别装进车厢（如上图的5件B，先装满第二个车厢，然后搜索后再将剩余的一件装入第一车厢）
·卸货：当到达某地时，以B为例，搜索链表，如果某个车厢都是该地货物，则从链表中删除此节点，并将其他零散B地货物从车厢中去除。

java Swing 实现的链表类

 package M;

 import java.awt.BorderLayout;
 import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;

 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JSplitPane;
 import javax.swing.JTextArea;

 class Carriage { /// 车厢
     int size = 0;// 表示当前车厢已经装了几个活物
     char a[] = new char[4];/// a用来装货物
     Carriage next;/// 连接下一个
 }
 public class A {

     private static int FLAG = -1;
     private final static int WIDTH = 800;
     private final static int HEIGHT = 400;
     private static Container container;
     private static JPanel UpPanel;
     private static JPanel bottomPanel;
     private static JButton Input0;
     private static JButton Input1;
     private static JButton Input2;
     private static JTextArea viewArea;
     private static JScrollPane jspane1;
     private static JSplitPane jsp;
     static int size = 5;/// 最初的5个车厢
     static Carriage Head = new Carriage();/// 最开始的都头结点

     public static void init() {
         // TODO Auto-generated constructor stub
         Carriage p = Head;
         for (int i = 0; i < 5; i++) {
             Carriage r = new Carriage();
             p.next = r;//// 连接
             p = r;
         }
     }

     public static void main(String[] args) {
         init();
         InitFrame();

     }

     public static void Logic(int a, char car, int num) {
         if (a == 0) {
             //System.out.println("准备打印链表状态");
             viewArea.append("准备打印链表状态\n");
             for (int i = 0; i < size; i++) {
                 PrintCarUp();
                 //System.out.print("    ");
                 viewArea.append("    ");
             }
             //System.out.println();
             viewArea.append("\n");
             Carriage p = Head.next;
             while (p != null) {
                 //System.out.print("*");
                 viewArea.append("*");
                 for (int i = 0; i < 4; i++) {
                     if (p.a[i] == 0)
                         //System.out.print(" ");
                         viewArea.append(" ");
                     else
                         //System.out.print(p.a[i]);
                         viewArea.append(String.valueOf(p.a[i]));
                 }
                 //System.out.print("*");
                 viewArea.append("*");
                 showNext();
                 p = p.next;
             }
             //System.out.println();
             viewArea.append("\n");
             for (int i = 0; i < size; i++) {
                 PrintCarUp();
                 //System.out.print("    ");
                 viewArea.append("    ");
             }
             //System.out.println();
             viewArea.append("\n");
         } else if (a == 1) {
             //System.out.println("请输入两个数，第一个为字母，第二个数字，例如 A 2");
             viewArea.append("请输入两个数，第一个为字母，第二个数字，例如 A 2");
             while (num != 0) {
                 Carriage p = Head;
                 while (p.next != null) {
                     if (p.next.size == 4)
                         p = p.next;
                     for (int i = 0; i < 4; i++) {
                         if (p.next.a[i] == 0) {
                             p.next.a[i] = car;
                             p.next.size++;
                             num--;
                         }
                         if (num == 0)
                             break;
                     }
                     if (num == 0)
                         break;
                     p = p.next;
                 }
                 while (num != 0) {
                     Carriage r = new Carriage();
                     p.next = r;
                     p = r;
                     for (int i = 0; i < 4 && num != 0; i++) {
                         r.a[i] = car;
                         num--;
                     }
                 }
             }
         } else {
             //System.out.println("请输入一个字母，例如 A");
             viewArea.append("请输入一个字母，例如 A");
             Carriage p = Head;
             int num1 = 0;
             while (p.next != null) {
                 for (int i = 0; i < 4; i++) {
                     if (p.next.a[i] == car) {
                         p.next.a[i] = 0;
                         num1++;
                     }
                 }
                 if (num1 == 4) {
                     Carriage r = p.next;
                     p.next = r.next;
                     r.next = null;/// 回收利用
                     size--;
                 } else {
                     p = p.next;
                 }
                 num1 = 0;
             }
         }
     }

     private static void InitFrame() {
         JFrame Main = new JFrame("Carriage");
         container = Main.getContentPane();
         container.setLayout(new BorderLayout());
         Main.setSize(WIDTH, HEIGHT);
         Main.setLocationRelativeTo(null);
         Main.setLayout(new BorderLayout());
         Main.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

         Input0 = new JButton("打印链表状态0");
         Input1 = new JButton("装货1");
         Input2 = new JButton("卸货2");
         UpPanel = new JPanel(new FlowLayout());
         bottomPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
         viewArea = new JTextArea("选择按钮 0,1,2，输入-1退出");
         viewArea.setLineWrap(true);
         viewArea.setFont(new Font("黑体", Font.BOLD, 15));
         jspane1 = new JScrollPane(viewArea) {
             private static final long serialVersionUID = 1L;

             @Override
             public Dimension getPreferredSize() {
                 return new Dimension(780, 280);
             }

             @Override
             public Font getFont() {
                 return new Font("黑体", Font.BOLD, 12);
             }
         };

         UpPanel.setSize(WIDTH, 150);
         bottomPanel.setSize(WIDTH, 250);

         UpPanel.add(Input0);
         UpPanel.add(Input1);
         UpPanel.add(Input2);

         bottomPanel.add(jspane1);

         jsp = new JSplitPane(JSplitPane.VERTICAL_SPLIT, UpPanel, bottomPanel);
         jsp.setDividerLocation(70); // 设置拆分窗格分频器初始位置
         jsp.setDividerSize(1); // 设置分频器大小
         container.add(jsp);
         // button lisenner
         Input0.addActionListener(e -> {
             FLAG=0;
             Logic(FLAG, '0', 0);
         });
         Input1.addActionListener(e -> {
             String inputValue = JOptionPane.showInputDialog("请输入两个数，第一个为字母，第二个数字，例如 A 2(注意空格)");
             // System.out.println("请输入两个数，第一个为字母，第二个数字，例如 A 2");
             if (inputValue.equals(" ") || inputValue == null) {

             } else {
                 char car = inputValue.charAt(0);
                 int num = inputValue.charAt(2) - '0';
                 FLAG=1;
                 Logic(FLAG, car, num);
                 // System.out.println(car+" "+num);
             }
         });
         Input2.addActionListener(e -> {
             String inputValue = JOptionPane.showInputDialog("请输入一个字母，例如 A");
             if (inputValue.equals(" ") || inputValue == null) {

             } else {
                 char car = inputValue.charAt(0);
                 FLAG=2;
                 Logic(FLAG, car, 0);
                 // System.out.println(car+" "+num);
             }

         });

         Main.setVisible(true);
     }

     private static void PrintCarUp() {
         //System.out.print("******");
         viewArea.append("******");
     }

     private static void PrintCarleft() {
         //System.out.print("*");
         viewArea.append("*");
     }

     private static void PrintCarright() {
         //System.out.print("*");
         viewArea.append("*");
     }

     private static void PrintCardown() {
         //System.out.print("******");
         viewArea.append("******");
     }

     private static void showNext() {
         //System.out.print("--->");
         viewArea.append("--->");
     }

     private static void print() {
         //System.out.println("请输入0 1 2 或者-1退出");
         viewArea.append("请输入0 1 2 或者-1退出");
         show();
     }
     public static void show() {
         //System.out.println("0-打印链表状态");
         //System.out.println("1-装货");
         //System.out.println("2-卸货");
         viewArea.append("0-打印链表状态");
         viewArea.append("1-装货");
         viewArea.append("2-卸货");
     }
 }